Answer:
4,800 feet²
Explanation:
[1] So we have two different units, 20 feet and 80 yards. First we need to get that into one unit. Since the answer is asking for feet, we will mutiple 80 by 3 (3 feet in a yard) to get 240 feet.
[2] We then mutiply 20 by 240 as area is length times width (or width times length) for an answer of 4,800.
[3] Last but not least, this is area so we have to answer in square feet. Our final answer is 4,800 feet²